thanks for the reply…

I read a commentary that said that the response “May the Lord accept the sacrifice at your hands” refers to the offering of the bread and wine before the Consecration, rather than afterwards… however, there is a part after the Consecration that says "In memory of his death and resurrection,
we offer you, Father, this life-giving bread, this saving cup". Is that referring to the Sacrifice?
All you have to do to refute those sede vacantist websites that you are probably reading is look to the wordings of the four main Eucharistic Prayers. They have many references to sacrifice. If you actually read the prayers, instead of going on the half-truths and outright lies of those anti-Ordinary Form Mass web pages, you would see the sacrificial language is everywhere.
Eucharistic Prayer I (The Roman Canon) Memorial Prayer
And from the many gifts you have given us
we offer to you, God of glory and majesty,
this holy and perfect SACRIFICE;
Eucharistic Prayer II Memorial Prayer
May all of us who share in the body and blood
of Christ
be brought together in unity by the Holy Spirit
Eucharistic Prayer III
And so, Father, we bring you these gifts.
We ask you to make them holy by the power of
your Spirit
that they may become the BODY AND BLOOD
of your Son, our Lord Jesus Christ,
at whose command we celebrate this EUCHARIST.
Memorial Prayer of EP III
Father, calling to mind the death your Son
endured for our salvation,
his glorious resurrection and ascension into heaven,
and ready to greet him when he comes again,
we offer you in thanksgiving this holy and living SACRIFICE.
Lord, may this SACRIFICE,
which has made our peace with you…
Eucharistic Prayer 4 Memorial Prayer
Father, we now celebrate this memorial of our redemption.
We recall Christ’s death, his descent among the dead,
his resurrection, and his ascension to your right hand;
and, looking forward to his coming in glory, we
offer you his body and blood,
the acceptable SACRIFICE
which brings salvation to the whole world.
Lord, look upon this SACRIFICE which you have give to your Church
and by your Holy Spirit, gather all who share in this one bread and one cup
into the one body of Christ, a living SACRIFICE of praise.